rule win_quickheal_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.quickheal."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.quickheal"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 50 64892500000000 81ec68070000 53 55 56 57 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   64892500000000       | mov                 dword ptr fs:[0], esp
            //   81ec68070000         | sub                 esp, 0x768
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_1 = { 6a40 8d542414 8b470c 8b37 8b5f04 }
            // n = 5, score = 100
            //   6a40                 | push                0x40
            //   8d542414             | lea                 edx, [esp + 0x14]
            //   8b470c               | mov                 eax, dword ptr [edi + 0xc]
            //   8b37                 | mov                 esi, dword ptr [edi]
            //   8b5f04               | mov                 ebx, dword ptr [edi + 4]

        $sequence_2 = { c1e902 f3a5 8bca 83e103 f3a4 8b7c2434 8bc8 }
            // n = 7, score = 100
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bca                 | mov                 ecx, edx
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8b7c2434             | mov                 edi, dword ptr [esp + 0x34]
            //   8bc8                 | mov                 ecx, eax

        $sequence_3 = { 894c241d 6689542449 894c2421 8854244b 8954244d }
            // n = 5, score = 100
            //   894c241d             | mov                 dword ptr [esp + 0x1d], ecx
            //   6689542449           | mov                 word ptr [esp + 0x49], dx
            //   894c2421             | mov                 dword ptr [esp + 0x21], ecx
            //   8854244b             | mov                 byte ptr [esp + 0x4b], dl
            //   8954244d             | mov                 dword ptr [esp + 0x4d], edx

        $sequence_4 = { 8d845cfe020000 83c408 33f6 6683f93b }
            // n = 4, score = 100
            //   8d845cfe020000       | lea                 eax, [esp + ebx*2 + 0x2fe]
            //   83c408               | add                 esp, 8
            //   33f6                 | xor                 esi, esi
            //   6683f93b             | cmp                 cx, 0x3b

        $sequence_5 = { f7d0 23c1 8bcd 23cb 0bc1 8b4c2420 03c2 }
            // n = 7, score = 100
            //   f7d0                 | not                 eax
            //   23c1                 | and                 eax, ecx
            //   8bcd                 | mov                 ecx, ebp
            //   23cb                 | and                 ecx, ebx
            //   0bc1                 | or                  eax, ecx
            //   8b4c2420             | mov                 ecx, dword ptr [esp + 0x20]
            //   03c2                 | add                 eax, edx

        $sequence_6 = { c7442420ff000000 e8???????? 8bf0 83c408 3bf3 0f84f4010000 8d5602 }
            // n = 7, score = 100
            //   c7442420ff000000     | mov                 dword ptr [esp + 0x20], 0xff
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   3bf3                 | cmp                 esi, ebx
            //   0f84f4010000         | je                  0x1fa
            //   8d5602               | lea                 edx, [esi + 2]

        $sequence_7 = { 8bd8 68???????? 895c241c ffd6 68???????? }
            // n = 5, score = 100
            //   8bd8                 | mov                 ebx, eax
            //   68????????           |                     
            //   895c241c             | mov                 dword ptr [esp + 0x1c], ebx
            //   ffd6                 | call                esi
            //   68????????           |                     

        $sequence_8 = { 50 c744246844000000 c784249400000001010000 66c78424980000000000 c7442470c8500110 ffd7 85c0 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   c744246844000000     | mov                 dword ptr [esp + 0x68], 0x44
            //   c784249400000001010000     | mov    dword ptr [esp + 0x94], 0x101
            //   66c78424980000000000     | mov    word ptr [esp + 0x98], 0
            //   c7442470c8500110     | mov                 dword ptr [esp + 0x70], 0x100150c8
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax

        $sequence_9 = { 83c474 c3 68???????? ff15???????? 85c0 7513 56 }
            // n = 7, score = 100
            //   83c474               | add                 esp, 0x74
            //   c3                   | ret                 
            //   68????????           |                     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7513                 | jne                 0x15
            //   56                   | push                esi

    condition:
        7 of them and filesize < 553984
}